| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Scandium Extraction and Use in Aluminum Alloys
|
| Presentation Title |
Hot Deformation Behavior and Post Brazing Grain Structure of Dilute Al-(Sc-Zr) Alloys for Brazed Heat Exchangers |
| Author(s) |
Alyaa Bakr, Paul Rometsch , X.-Grant Chen |
| On-Site Speaker (Planned) |
X.-Grant Chen |
| Abstract Scope |
In this work, dilute Al-0.07Sc and Al-0.07Sc-0.09Zr alloys were assessed with respect to the hot deformation and the post brazing grain structure and compared with the base 1xxx alloy. The flow curves of the hot compression tests showed that the Al-Sc-Zr alloys exhibited higher flow stresses compared to the base alloy. The microstructure of the deformed samples in all three investigated alloys exhibited a recovered microstructure, but the dilute Al-Sc-Zr alloys showed an improvement in the resistance to dynamic recovery. EBSD maps after a simulated high temperature braze showed that the microstructure of the base 1xxx alloy suffered from severe grain coarsening. Few coarsened grains were observed in the recrystallized microstructure of the Al-0.07Sc alloy after brazing, while no severely coarsened grains were observed in the microstructure of the Al-0.07Sc-0.09Zr alloy after brazing, indicating an improvement in the resistance to grain coarsening due to the addition of Sc and Zr. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Other, |